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Western White Pine (Pw)

The use of Pw is restricted by blister rust, which cannot be moderated by stock type selection. For this reason, blister-rust resistant seed should be used. Use of non-resistant seed may require a commitment to pruning.

The major limiting factors that stock type selection can address for Pw are animal damage and vegetation competition.

Western white pine produces prolific roots in the nursery and should never be ordered as 2+0 container or in containers smaller than 313B. It is almost always available with secondary needle morphology. Significant advances have occurred in nursery culture practices making more high-quality seedlings available for planting.

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Spruce (Sx)

Lodgepole Pine (Pli/Plc)

Western Redcedar (Cw)

Coastal Douglas-fir (Fdc)

Interior Douglas-fir (Fdi)

Sitka Spruce (Ss and Sxs)

Western Larch (Lw)

Western White Pine (Pw)

Yellow Pine (Py)

Subalpine Fir (Bl)

Amabilis Fir (Ba)

Noble Fir (Bn)

Grand Fir (Bg)

Western Hemlock (Hw)

Mountain Hemlock (Hm)

Yellow-cedar (Yc)

Hardwoods

Native Shrubs

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Sowing Trends ­ 1993/1998
Species:   Western white pine (Pw)

  1993 1998

% of total sowing of Pw
     1 + 0
     BBR/PBR
95
0
95
1
# of stock types 7 5
Dominant container types 313B 415B/410
Smallest container type 313B 313B
Largest container type 415D 415D
Quantity sown (K) 518 981

New stock types since 1993:  412A/615A

Pie graph showing Pw stock type profile, 1998 sowing.

Plate 29.   Pw stock types. All stock types display secondary needle morphology. (Arrowheads indicate target heights.)

Pw stock types.


Pw stock type suitability.

Pw Limiting factors
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spacer graphic Season Vegetation
competition
Snow-
press
Animal
damage

Recommended stock types:
PSB 410 1+0 Sp Fair Good Fair
PSB 415B 1+0 Sp Fair Fair Fair
PSB 412A 1+0 Sp Good Good Fair
PSB 415D 1+0 Sp Good Good Fair


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